<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>能拖动的div</title>
        <link rel="stylesheet" href="style.css">
    </head>

    <body>
        <script src="main.js"></script>
    </body>

</html>